1) WD-40 is not a lubricant, it is a Water Displacement spray. It doesn't hang around long enough to be useful as a lubricant. I use motorcycle chain lube on my door check, the long spout helps me get it closer to where it needs to go. Plus I've had it around for a long time.

2) **********.com online, in Tempe, but over $100.00 order is free shipping. They have a lot of stuff for Mercedes.

3) If you need something immediately, BAP Imports should be able to help you for a lot of stuff. 14 locations around the valley.

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Remember, it's not just a car. It's an Adventure.